AZ31B Magnesium vs. AZ91D Magnesium
Both AZ31B magnesium and AZ91D magnesium are magnesium alloys. They have a moderately high 94% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is AZ31B magnesium and the bottom bar is AZ91D magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 45 | |
| 46 |
| Elongation at Break, % | 5.6 to 12 | |
| 2.3 to 4.5 |
| Fatigue Strength, MPa | 100 to 120 | |
| 74 to 85 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 17 | |
| 18 |
| Shear Strength, MPa | 130 to 160 | |
| 120 to 140 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 270 | |
| 160 to 220 |
| Tensile Strength: Yield (Proof), MPa | 120 to 180 | |
| 80 to 130 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 350 |
| Maximum Temperature: Mechanical, °C | 150 | |
| 130 |
| Melting Completion (Liquidus), °C | 600 | |
| 600 |
| Melting Onset (Solidus), °C | 600 | |
| 490 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 990 |
| Thermal Conductivity, W/m-K | 100 | |
| 78 |
| Thermal Expansion, µm/m-K | 26 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 95 | |
| 58 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 12 |
| Density, g/cm3 | 1.7 | |
| 1.7 |
| Embodied Carbon, kg CO2/kg material | 23 | |
| 22 |
| Embodied Energy, MJ/kg | 160 | |
| 160 |
| Embodied Water, L/kg | 970 | |
| 990 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 25 | |
| 4.2 to 7.7 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 170 to 370 | |
| 69 to 170 |
| Stiffness to Weight: Axial, points | 15 | |
| 15 |
| Stiffness to Weight: Bending, points | 70 | |
| 69 |
| Strength to Weight: Axial, points | 39 to 44 | |
| 26 to 34 |
| Strength to Weight: Bending, points | 50 to 55 | |
| 38 to 46 |
| Thermal Diffusivity, mm2/s | 62 | |
| 45 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 9.5 to 13 |
Alloy Composition
| Aluminum (Al), % | 2.4 to 3.6 | |
| 8.3 to 9.7 |
| Calcium (Ca), % | 0 to 0.040 | |
| 0 |
| Copper (Cu), % | 0 to 0.050 | |
| 0 to 0.030 |
| Iron (Fe), % | 0 to 0.050 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 93.6 to 97.1 | |
| 88.7 to 91.2 |
| Manganese (Mn), % | 0.050 to 1.0 | |
| 0.15 to 0.5 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 0 to 0.0020 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0.5 to 1.5 | |
| 0.35 to 1.0 |
| Residuals, % | 0 to 0.3 | |
| 0 |